This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 118e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2025-11-05

1393. Pack expansions in using-declarations

Section: 13.7.4  [temp.variadic]     Status: C++17     Submitter: Daniel Krügler     Date: 2011-09-10

[Accepted at the November, 2016 meeting as part of paper P0195R2.]

It would be handy if a pack expansion could appear in a using-declaration:

    template <class... Mixins>
    class X : Mixins... {
      using Mixins::foo ...; // Currently not supported
    };

Rationale (February, 2012):

This is not a defect but a request for an extension and thus more appropriately addressed by EWG.